adverb, adverb taking the 'to' particle
guffawing; roaring with laughter; laughing heartily
Mimetic word for loud, hearty, often uncontrollable laughter. Often used with 笑う or 笑い.
彼の冗談にみんながゲラゲラ笑った。
Everyone roared with laughter at his joke.
テレビ
I'm laughing out loud while watching TV.